濾筒是長度挺括的濾料折疊成褶，首尾粘合而成的星形過濾筒。濾筒無籠骨，安裝簡便。
濾筒的品種較多，有細而長與粗而短之分。細長濾筒（如φ≤160，L=1～2m），其褶（如45褶）間空隙大、夾角大，褶少而淺，
過濾面積比同徑同長的濾袋大2～5倍，清灰易而效果好；適用于濃度≥15g/m粉塵的過濾除塵，過濾風速0.6～1.2m/min。
粗短濾筒（如φ350，L=0.66m）直徑大、長度短、褶多(120～350褶)而深、褶間空隙小，過濾面積大，較之同徑同長濾袋面積大14～35倍，
適于場地面積小、空間小的地方布置；但因褶角小，粉塵易積聚，難于清灰，適于濃度≤5g/m粉塵的過濾除塵，過濾風速不宜>0.6m/min。
濾筒脈沖除塵器的安裝方式有三種：垂直、傾斜、水平安裝。濾筒垂直安裝，脈沖清灰時，粉塵易清落沉降至灰斗，效果好。
傾斜安裝時，濾筒上下相疊，結構緊湊，占地面積小，便于換筒，但清灰時，上層濾筒清落的粉塵沉落于下層濾筒上。
水平安裝，下層濾筒上部的粉塵。
傾斜暗中濾筒除塵器適于中小除塵系統非粘性、低濃度、粒粗粉塵除塵用,也適于一些老式袋除塵器的改造用。
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